Diagnostic Aids

1999 Chevrolet Suburban C2500, 6.5 FSECTION Diagnostic Aids

Use the FAILURE REC mode on scan tool and note conditions under which the DTC set. If A/C HIGH SIDE TEMP. was close to 189Β°F (87Β°C), then a high pressure condition probably occurred. If A/C HIGH SIDE TEMP. was low, then an intermittent open circuit or switch probably set the DTC.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.